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THE EFFECT OF CONE BEAM COMPUTED TOMOGRAPHY (CBCT) IMAGING
ON ORTHODONTIC DIAGNOSIS AND TREATMENT PLANNING
by
Soraya Chinea
A Thesis Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(CRANIOFACIAL BIOLOGY)
May 2011
Copyright 2011 Soraya Chinea

Introduction: The effect of cone-beam computed tomography (CBCT) imaging on orthodontic diagnosis and treatment planning has not been fully elucidated despite the increasing use of 3-dimensional (3-D) radiography in dentistry. The application of CBCT imaging in orthodontics has been shown to provide information that aids in the localization of impacted canines1, 2, 3 , placement of miniscrews4, 5, 6, identification of pathology7, 8, and assists in the assessment of alveolar bone levels9, 10, orthodontic tooth movements11, 12, the temporomandibular joint (TMJ)12, 13, 14, sinuses15, 16, and airway.15, 17, 18 In addition, CBCT is useful for the evaluation of root resorption11 and planning of orthodontic treatment19, 20. While the clinical value of CBCT is mostly empirical, there are no specific studies so far to evaluate the differences between the diagnosis and treatment plans of orthodontic patients when using conventional records and CBCT images.; Purpose: Our hypothesis is that CBCT imaging provides additional information that will influence orthodontic diagnosis and treatment planning.; Methods: Four orthodontic examiners diagnosed and created treatment plans for 38 consecutively selected orthodontic patients using conventional orthodontic records (photos, panoramic and lateral cephalometric radiographs) and CBCT images. Examiners completed written questionnaires to indicate their diagnosis and preferred plan of treatment for each case at three different points in time, each one month apart using conventional orthodontic records for the first two analyses (T1, T2) and CBCT data in addition to traditional records for the third (T3). The level of experience with CBCT imaging of the examiners was also scored. The diagnoses and treatment plans at the three points in time were compared.; Results: Statistically significant differences (p

THE EFFECT OF CONE BEAM COMPUTED TOMOGRAPHY (CBCT) IMAGING
ON ORTHODONTIC DIAGNOSIS AND TREATMENT PLANNING
by
Soraya Chinea
A Thesis Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
MASTER OF SCIENCE
(CRANIOFACIAL BIOLOGY)
May 2011
Copyright 2011 Soraya Chinea